【摘要】 对于感性负载,其启动时的功率因数较大,而短路时的功率因数几乎为零,两者相差较大。可利用启动电流和短路电流的这一特点来识别两者,以避免保护的误动。理论分析和仿真试验表明:本方法可以准确地识别感性负载的启动电流和短路电流,并且简单可行。更多还原

【Abstract】 For the inductive load,the power factor of the start current is comparatively large and that of the short circuit current is nearly equal to zero.Therefore,the starting current and short-circuit current can be distinguished using the characteristic mentioned so as to avoid the malfunctions of the protective devices.The results of theoretical analysis and simulative experiment showed that the method mentioned in paper can accurately distinguish the startup current and the short-circuit current and was simple to be implemented.更多还原